mikejuk writes: You may have have though that games like Mario, Donkey Kind and so on were hard at the time you were playing them, but you probably didn't guess that they were NP-hard.Now we have some results from computer scientists at Universite Libre de Bruxelles and MIT Computer Science and Artificial Intelligence Laboratory (CSAIL) that many classic games contain within them an NP-hard problem. It is a bit like the discovery of a black hole at the center of every galaxy. Should either fact be surprising?It has been proved that the following games are NP-hard: Mario, Donkey Kong, Legend of Zelda, Metroid and Pokemon.At least you now have an excuse for your low scores.